Assessment of masonry arch railway bridges using non-destructive in-situ testing methods

Orbán, Zoltán; Gutermann, Marc

doi:10.1016/j.engstruct.2009.04.008

Cited by 129 publications

(58 citation statements)

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“…The fill and backfill of masonry arch bridges influence the structural behaviour of the vault significantly, since they have both stabilizing and load distributing function [4,20]. Therefore these effects have to be considered in order to get a result that best models the behaviour of the masonry arch.…”

Section: Loadingmentioning

confidence: 99%

“…Since the condition of most bridges aggravated and the traffic loads have increased significantly, the verification of the stability and the calculation of the load-bearing capacity of these bridges are required. Thus several Hungarian stone masonry arch bridges were investigated in the past few years [2][3][4][5][6][7][8][9]. It has been found that it is difficult to determine adequate input parameters for the numerical modelling from the in situ tests even for simple methods such as thrust line analysis.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Testing of a Small-Scale Stone Masonry Arch

Bögöly

Görög

2015

Period. Polytech. Civil Eng.

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IntroductionMaintenance and restoration are common problem of historical stone structures. There are more than 1500 stone masonry arch bridges in Hungary which were built primarily in the 18th and 19th centuries [1]. Since the condition of most bridges aggravated and the traffic loads have increased significantly, the verification of the stability and the calculation of the load-bearing capacity of these bridges are required. Thus several Hungarian stone masonry arch bridges were investigated in the past few years [2-9]. It has been found that it is difficult to determine adequate input parameters for the numerical modelling from the in situ tests even for simple methods such as thrust line analysis. Naturally, the more complex methods require more precise input parameters. Nonetheless, the results of these more complex models describe better the behaviour of the masonry vaults. All things considered, great accuracy is expected from the numerical models, though it is not attained in case of practical applications. In general, it is very difficult to obtain the input parameters which can modify the results significantly. Therefore it is important to determine the scale of these effects and get to know their behaviour better by means of laboratory and numerical experiments.Within the masonry vaults predominantly compression, and in a smaller extent shear and friction occur from the external loads. The main point in design of arch geometries is to allow the smallest tension to occur, since the connections of real masonry arches usually do not resist high tensions. If a vault is capable of bearing a significant tensile stress, then it is a continuum shell rather than a masonry shell. Thus the bonding strength of the connections influences the behaviour of the arches significantly. In case of small scale laboratory experiments the bonding strength has a more important influence on the stability of the structure. As a consequence, this parameter was analysed by means of numerical modelling.The aim of this paper is to provide information about the required parameters for the analysis of the behaviour of stone arches by means of experiments. To increase the reliability of models and to have a better accuracy of the input parameters scale laboratory experiments are required with the combination

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Section: Loadingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical Testing of a Small-Scale Stone Masonry Arch

Bögöly

Görög

2015

Period. Polytech. Civil Eng.

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“…Since traffic, with the related loads, has increased significantly, in many cases the verification of their stability and load-bearing capacity has become necessary. Several research branches deal with the analysis of masonry arches; Gilbert and Melbourne (1994), Giordano et al (2002), Gubányi-Kléber and Vásárhelyi (2004), Cavicchi and Gambarotta (2006), Orbán (2006), and Callaway et al (2012) provide some examples. In the past few years several historical stone bridges, mostly in North Hungary, were also investigated by the Department of Building Materials and Engineering Geology.…”

Section: Introductionmentioning

confidence: 99%

Dimension stones of the North Hungarian masonry arch bridges

Bögöly

Török

Görög

2015

Central European Geology

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Stone masonry arch bridges in North Hungary represent cultural heritage values. For the maintenance and preservation of these bridges detailed mapping of lithologies and weathering forms are required. The purpose of this paper is to present the identified lithotypes, their conditions (weathering grade) and their petrophysical properties by using in situ lithological mapping, documentation of weathering forms, non-destructive tests and laboratory analyses. Furthermore these analyses demonstrate the difficulties of characterization and diagnostics of the historical construction materials. Additionally the results of condition assessments and the properties of the four different dimension stones from four different sites provide examples for the large dissimilarities regarding the strength parameters. The above-listed parameters are required as input data for stability calculations and modeling of these structures.

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“…GPR is a non-destructive method that provides a relatively quick geophysical measurement and is widely used for testing various engineering structures by providing continuous images of the interior of the media being analyzed [18,19]. GPR can provide information on the medium and details of a structure [20,21], such as pavement analysis [22], bridge and railway monitoring [23], the location of reinforcing bars and metal elements in concrete bases [24], the damage in reinforced concrete [18], and layer thickness [25]. GPR can also be adopted in coal mines.…”

Section: Introductionmentioning

confidence: 99%

Assessment of Excavation Broken Zone around Gateways under Various Geological Conditions: A Case Study in Sichuan Province, China

Yang

Cao

et al. 2016

Minerals

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Abstract:To study common failure characteristics of gateways, a total of 55 typical gateways at coal mines, in Sichuan Province, China, were selected for investigating the rules of broken widths based on the ground-penetrating radar (GPR) technique and numerical model. Results indicated that the broken width values around the gateways were larger than 1.5 m, and those in the roof and high side wall were larger than those in the low side wall, as a whole. The width values had close relationships with the thickness of the coal seam and immediate roof, angle of the coal seam, and depth of the gateways. Furthermore, combined with the plastic zone of numerical models in 3-Dimensional Distinct Element Code (3DEC) and the broken width, we obtained the excavation broken zone (EBZ) cross-section diagram for each gateway and determined that the EBZ appeared to have a basically elliptical shape-with the long axis along the seam inclination direction and the short axis along the vertical direction of the rock layer-and that this elliptical shape was only slightly affected by the gateway cross-section shape. It was observed that the failure extent was greater in the seam inclination direction than in the vertical direction of the rock layer. Obviously, the gateways presented asymmetric failure characteristics and implied that an asymmetric support system should be provided when using bolts, cables, and shotcrete combined with steel mesh and steel belts. Such a support system could improve material parameters and form a combined arch structure in surrounding rocks, with arch crown and arch springing thicknesses that are larger in the roof and high side wall.

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Assessment of masonry arch railway bridges using non-destructive in-situ testing methods

Cited by 129 publications

References 4 publications

Numerical Testing of a Small-Scale Stone Masonry Arch

Numerical Testing of a Small-Scale Stone Masonry Arch

Dimension stones of the North Hungarian masonry arch bridges

Assessment of Excavation Broken Zone around Gateways under Various Geological Conditions: A Case Study in Sichuan Province, China

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